961841320044 has 96 divisors (see below), whose sum is σ = 2559085208064. Its totient is φ = 278323921920.

The previous prime is 961841320019. The next prime is 961841320051. The reversal of 961841320044 is 440023148169.

It is a junction number, because it is equal to n+sod(n) for n = 961841319978 and 961841320005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1533222 + ... + 2067474.

It is an arithmetic number, because the mean of its divisors is an integer number (26657137584).

Almost surely, 2^961841320044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 961841320044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1279542604032).

961841320044 is an abundant number, since it is smaller than the sum of its proper divisors (1597243888020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

961841320044 is a wasteful number, since it uses less digits than its factorization.

961841320044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534887 (or 534885 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 961841320044 in words is "nine hundred sixty-one billion, eight hundred forty-one million, three hundred twenty thousand, forty-four".